Hi,
we have rolled out PROB last year. But it seems that the process itself is not accepted by the users for several reasons like:
- they dont see the benefit
- they have no time to use it and see it as redtape
- they do it already on the fly (analyzing INC tickets and creating RfCs)
...

is there any standard approach how to relaunch the process in terms of actions I can take in order to make it more beneficial?

The process it self is already pretty lean. We have also the necessary tools available.
Maybe somebody has a document I can read which provides me with some additional ideas?
For me I have identified to take the following actions:
- process marketing / user awareness
- CIP and process reviews
- trainings
etc.

I know the question is very general but maybe somebody found some interessting documents on the web related to that topic worth scanning through ...

In terms of training, you might want to check for 'ATS' (Analytical Trouble Shooting'). Where ITIL-Problem mgt tells you what to do, ATS tells you HOW to do it. If you google on ATS and Keppner & Tregoe you should find them.

Have you already started reporting (weekly or monthly)? By making a simple yet usefull report and sending this to management, you will improve the chance that you get management support.